//
// Created by yangchao on 2022/6/3.
// 122. 买卖股票的最佳时机 II: https://leetcode.cn/problems/best-time-to-buy-and-sell-stock-ii/
//

#include <vector>
using namespace std;

class MaxProfit {
public:
    int maxProfit(vector<int>& prices) {
        int len = prices.size();
        int dp[len][2];
        dp[0][0] = 0, dp[0][1] = -prices[0];
        for (int i = 1; i < len; ++i) {
            //前一天没有股票；或者前一天有股票，这时候我们将其卖出
            dp[i][0] = max(dp[i-1][0],dp[i-1][1] + prices[i]);
            dp[i][1] = max(dp[i-1][1],dp[i-1][0] - prices[i]);
        }
        return dp[len-1][0];
    }
};

